Research Article
Low-Cost Portable Road Smoothness Testing Method Based on Pseudo-Vibration Velocity Range
Table 4
Road surface unevenness IRI prediction based on driving acceleration.
| | Type | Speed (km/hr) | Test road segments | Fitting formula | Predictive road segments |
| | Sedan | 40 | 1−1, 1−2, 2−1, 2−2, 3−1 | y = 0.3745x − 0.2069 | 3–2 | | SUV | 40 | 1−1, 1−2, 2−2 | y = 0.4853x − 0.6834 | 3–1 |
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